Nand gratiettx



- R. HANBIOT 'AND F. GRATIEUX.

AEROPLANE.

APPLICATION FILED Nov.23.19|1.

.1 ,3 1 1 ,967. Patented Aug. 5, 1919.

UNITED STATES PATENT OFFICE.

RENE HANRIOT, OF NEUILLY-SUR-SEIN'E, AND FERNAND GRATIEUX, OF PARIS,FRANCE, ASSIG-NORS TO SOCIETE R. HANRIOT ET GIE., OF BILLANCOURT,

FRANCE.

AEROPLANE.

Specification of Letters Patent.

Patented Aug. 5, 1919.

To all whom it may concern: I Be it known that I, Rum: HANRIOT, acitizen of the French Republic, residing at 32 mechanism for the ascentor descent rudder or elevator of aeroplanes, arranged under suchconditions that all the organs of this apparatus are placed in theinterior of the fuselage.

This mechanism is illustrated in the accompanying drawing in elevation.

In this drawing a indicates the elevator which has to turn upon ahorizontal axis at right angle to the direction of the apparatus. Thismotion is controlled as follows.

The control lever b, operated by the pilot oscillates about a fixedpoint 0. On both sides of this point of oscillation there are attachedto this lever at e and at d on the one hand the cables ff, and on theother hand gg. These cables extend the length of the fuselage, suitablyguided or conveyed by pulleys or other convenient arrangements, and areattached to the correspondings ends i and 7' of a rod it placed at therear of the said fuselage, in the middle lane of the apparatus. Thecables, f, 9 rod and the part of the lever I) included between d and eform the sides of a parallelogram.

At the upper end of the rod 71. there is articulated an adjustablecoupling rod 70' formed of a steel tube, which rod is connected with alever Z fixed upon the rudder a at the middle of the horizontal tube mwhich possesses the articulations.

This mechanism has been devised for the purpose of placing thecontrolling parts in the interior of the fuselage and thus avoiding allpassive resistance.

What we claim is In combination with an aeroplane elevator a controlmechanism comprising a control lever pivoted near its lower end on theaeroplane frame, cables attached to said control lever respectivelyabove and below the said pivot and extending the length of the fuselage,a vertical rod at the rear of the fuselage pivoted at its center to theframe in its longitudinal axial plane, and having the aforesaid cablesattached to its upper and to its lower end respectively, and anadjustable connecting tube attached at its front end to one end of theaforesaid vertical rod and at its rear end to a lever keyed on therotatable axles of the aeroplane elevator.

In testimony whereof we sign our names to this specification in thepresence of two subscribing witnesses.

RENE HANRIOT. FERNAND GRATIEUX.

Witnesses:

HENRI BLomN, CHAS. P. PRESSLY.

copies ot this patent may be obtained for five cents eaoh, by addressingthe "Commissioner of Estonia, Washington, D. 0."

